Steam pumping-engine



(No Mode 1.)

0. SINTZ] STEAM PUMPING ENGINE. No. 305,971. Patented Se t, 30, 1884,

1 12 .3 Fig.3

' e rb'hme 2 M @211? 331 0118 (428-0 filmy UNITED STATES PATENT ri icaCLARK SINTZ, OF SPRINGFIELD, OHIO.

STEAM PUMPING-ENGINE.

SPECIFICATION forming part of Letters Patent No. 305,97l', datedSeptember 30, 1884. Application filed March 29, 1884. (X0 model.)

.To aZZ whom it may concern.-

Be it known that I, CLARK SINTZ, of the city of Springfield, in thecounty of Clark and State of Ohio, have invented certain new and usefulImprovements in Steam Pumping-Engines, of which the following is aspecification.

Hy invention relates to steam'pumps, and particularly to that class ofpumps in which the main valve is actuated bythe steam operating through.the agency of a supplemental piston.

My invention consists in novel organizations and combinations ofmechanism, as herein-' after described and claimed; and its objects are,first, to provide means whereby steam is supplied to both ends of thesupplemental piston at all times except at the moment of throwing themain valve 5 second, to provide forpositivcly moving the main valve incase the supplemental piston should stick or fail to operate; third, torender the supplemental piston capable of a rotary movement independentof the main valve; and, fourth, to provide a simple, light, andinexpensive plunger for the pump. I attain these objects by themechanism illustrated in the accompanying drawings, in which a Figure lis a side elevation view of a pump embodying myinvention. Fig. 2 isavertical sectional view of the steam-chest and cylinder thereof takenlongitudinally through the supplemental piston. Fig. 3 is a vertical sectional view of the steam-chest and cylinder taken at right angles to thesupplemental piston. Fig. etis avertical longitudinal sectional view ofthe steam-chest with the valves and supplemental piston removed. Figs.5, 6, and 7 are front, end, and back views, respectively, of the reversevalve; and Fig. Sis a top or plan view of the main valve.

Like parts are indicated by similar letters of reference throughout theseveral views.

A represents the main cylinder; B, the steanrchest; O, the pump, and Dthe plunger. The steam-chest B contains the main valve a, thesupplemental piston b, adapted to actuate said main valve, and thereversevalve 0, adapted to admit and exhaustthe steam to and from therespective ends of the supplemental piston b. The reverse-valve c issecured 011 the end of a valve-stem, c, which extends to the outside ofthe steam-chest B at right angles to the supplemental piston Z). Acrank, d, on the outer end of' said valve-stem 0 receives motion througha suitable connection, cl, from the plunger D. As the plunger Dreciprocates up and down, the valve-stem 0' through the medium of crankd is given an os= cillatory movement on its axis, carrying with it thereverse-valve c, The supplemental piston bfit-s at each end in chambersee, to which the steam is admitted through portsf and f, located in theseat of the reverse-valve 0. An exhaust-port f", also located in saidvalve-seat, opens directly into the main exhaust-passage from the maincylinder A. The reverse-valve c is provided on its face with anexhaustpocket, h, (see Fig. 7,) adapted to cover the exhaustport f atall times, and at the ends of the stroke of the pump to connect therespective port-s f and f with said exhaust-port f The reverse valve 0is so constructed that both the steam-portsf and f are. always open,except at the time of exhausting from one end of the supplemental pistonb. This is preferably accomplished by cutting the face of the valve awayat the top, as shown in Fig. 7, at i i. to have bearing on each side ofthe valvestem, and thereby tend to wear the valve-seatevenly.

The valve may thus be large enough l The reverse-valve 0 may be securedrigidly on the end of the stem 0, or, as is preferable, it may be madeseparate therefrom and provided at the back'with a recess, Z, in which aT-head, Z, on the end of the valve-stem c is adapted to rest. The valve0 is thus adapted to turn wit-11 the stem 0, but is capable of adjustingitself independently of the valve stem, to compensate for any wear onthe valve-seat.

The main valve (6 is of the ordinary slide pattern, and is adapted toadmit and exhaust the steam to and from the respective ends of the maincylinder A in the ordinary manner.

The main valve a is connected to the supplemental piston 11, and ismoved thereby. It is desirable that the connection between the supplemental'piston and the main valve be such that the said piston may becapable of a rotary movement about its axis, so that in case finesediment or grit should be carried into the steanrchest by the primingof the boiler or otherwise, the piston, instead of traveling in the samepath, and thus forming longitudinal grooves in the respective chambersce,would have a tendency to make a slight revolution about its axis ateach stroke, and thus bring new surfaces into contact, therebypreventing the grooving of the said chambers. I preferably accomplishthis by reducing the size of the piston b in the center, forming ajournal, b,which is adapted to rest in a concave hearing in the top ofthe valve a, said valve being adapted to fit the journal I) and to restsnugly between the shoulders 1)", formed at each end of said journal.(See Figs. 2 and 3.) The main valve a is thus adapted to be movedpositively by a longitudinal movement of the supplemental piston b, saidpiston being capable of a rotary movement on its axis inclependently ofsaid main valve. The main valve a is provided on one side with a lug,a,which extendsinto areeess, a, formed between two lugs or shoulders, 00', on the back of the reverse-valve c. If it should happen that fromany cause the supplementalpiston I) should stick in the chambers c c",the lugs 0 and 0,respectively, would engage on opposite sides of the lug(d on the main valve at either end of the pump-stroke, and thus throwthe said valve over.

To secure lightness combined with strength, I construct my pump-plungerD of a hollow tube or pipe, D, to whicl1,at either end,are sccured themain piston D and the plunger proper, D, respectively, the said partsbeing held together by a bolt, 1', which passes longitudinally throughsaid plunger D, or in any other suitable manner.

The operation of my pump is as follows: The steam enters the steam-chestat E and passes through the normallyopen ports f f and enters into thechambers e c at the respective ends of the piston b. The said pistonthus has an equal pressure on each end, and is completely surrounded bylive steam, which keeps the chambers at the ends of the piston I) alwayshot, and thus prevents condensation. The main valve (1, being in thepost tion shown in Fig. 2, the steam enters the cylinder A and forcesthe plunger D to descend. As the plunger descends a rotary oroscillating motion is imparted to the reversevalve 0 through the mediumof the crank (Z and connection (1. The valve 0 is thus revolved untilthe plunger has nearly reached the end of its downward stroke, at whichtime the pocketh in said valve covers the port f, and the steam in thechamber 0, at one end of the supplemental piston b, is exhausted throughthe exhaustportf The supplemental piston is thus relieved from pressureat one end, and the pressure at the other end immediately forces thesaid piston into the exhausted chamber, thus changing the position ofthe main valve a and admitting the steam to the lower end of thecylinder A. The plunger is now forced upward until near the end of theupward stroke, when the pocket It covers the other steam-port f thusexhausting the steam from chamber 0 and changing the position of themain valve a, as before. As the plunger D approaches the limit of itsstroke at either end the crank (Z is traversing that portion of its areof travel at which. its velocity is greatest. The reverse-valve c isthus moved quickly over the ports f and f, respectively, and the mainvalve a reversed almost instantly. At the same time the pocket It coverseither of the ports ff. One of the lugs 0 0 on the reverse-valve engageswith the lug a on the main valve, and in case the pressure of the steamdoes not start the-piston I; instantly the valve to is movedlongitudinally by the said lugs. This last-mentioned feature is of greatutility in starting the pump after it has been standing idle for sometime, under which circumstances the piston 11 may "have become rusted orstuck fast in its chambers, and will not readily move by the pressure ofthe steam. By having the steam-ports f and f normally open, and thuskeeping the press ure equal at both ends of the piston, except at themoment of reversing the position of the main'valve, the chance ofleakage by blowing past the piston is confined to the short space oftime consumed in reversing the valve. The chambers at the ends of thepiston are also thus kept heated by the live steam therein, the openingto the air through. the exhaust-port being closed immediately after thevalve is reversed.

Having thus described my invention, I claim 1. In a steam-pumpprovidedwith a supplemental piston adapted to move the main slide-valve, thereverse-valve 0, provided with the exhaust-pocket h, and adapted toadmit steam to both ends of said supplemental piston, except at themoment of changing the position of the main valve, substantially as setforth.

2. The rcverse-valve 0, provided with re cess a and lugs 0 0, adapted toengage with lug a on the main valve, substantially as and for thepurpose specified.

3. The combination, with the supplemental piston and the main valveactuated thereby, said main valve being provided with a lug, a, of thereverse-valve adapted to normally admit steam to both ends of saidpiston, and to exhaust said steam alternately from the ends of saidpiston, said reversevalve being provided with lugs 0 0, adapted toengage with lug a on the main valve in case said main valve fails tomove by the action of the said piston, substantially as set forth.

4. The combination, with the supplemental piston b and the mainvalve a,adapted to be moved thereby, of a reverse-valve, 0, adapted to normallyadmit steam'to both ends of said piston, and to exhaust said steamalternately from the ends of the said piston as the pump approaches thelimit of its upward or downward stroke, substantially as specified.

In testimony whereof I have hereunto subscribed my name this 25th day ofMarch, 1884:. XVitnesses: CLARK SINTV.

CHASE STEWART, PAUL A. SriLnv.

